Pipestonekid
Don't think they custom made them, but just pulled the closest one that might fit out of stock. That has been my impression all along with Tirechain.com and pics of their chains on TBN over several years. Owners don't really know the difference, and make do best they can.
Reason I made mine (don't think I saved any money either) was the closeness of the tire to the fender (long before I added the spacers). I wanted the side chains to fit in the depression at the ends of the tire bars, and not down on the sides of the tires. So calculated the length of the side chains and the length of the cross chains for this custom fit.
In 16 years, never have had even an inkling of them slipping off and have used them often for logging in the woods as well as in deep snow (deep snow I put chains on the front tires too).